Basic Info
n-XS summary
element
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Information about Neptunium-239:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 239.052931 | ± | 0.000002 | amu |
| Excess Mass (Δ): | 49.305273 | ± | 0.002133 | MeV |
| Binding Energy: | 1806.982011 | ± | 0.002158 | MeV |
| β- Decay Energy: | 0.721796 | ± | 0.000874 | MeV |
"The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra,
Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.
Radioactive Decay Data:
- Spin: 5/2+
- Half life: 2.3565 days ( 203602 sec., λ = 3.40443×10-06 s-1)
- Mode of decay:
β- to
(Q = 0.722 MeV)
- Possible parent nuclides:
- β- from
- α from
R.R.Kinsey, et al.,The NUDAT/PCNUDAT Program for Nuclear Data,paper submitted to the 9 th International Symposium of Capture-Gamma_raySpectroscopy and Related Topics, Budapest, Hungary, Octover 1996.Data extracted from NUDAT database (Jan. 14/1999)
Magnetic Dipole Moments and Electric Quadrupole Moments
| Ex(kev) | T1/2 | Spin | | m(nm) | | Q(b) | | Ref. Std. | Method | Reference |
| 75 | 1.40 ns | 5/2- | | +2.0(3) | | | | [237Np 60] | IPAC | NP A104 588 (67) |
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N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published. 2000 Courtesy of T. Burrows at BNL/NNDC.
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